EP0026582A2 - Verstellmechanismus - Google Patents

Verstellmechanismus Download PDF

Info

Publication number
EP0026582A2
EP0026582A2 EP80303073A EP80303073A EP0026582A2 EP 0026582 A2 EP0026582 A2 EP 0026582A2 EP 80303073 A EP80303073 A EP 80303073A EP 80303073 A EP80303073 A EP 80303073A EP 0026582 A2 EP0026582 A2 EP 0026582A2
Authority
EP
European Patent Office
Prior art keywords
members
pair
spring
spring element
spring elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80303073A
Other languages
English (en)
French (fr)
Other versions
EP0026582A3 (en
EP0026582B1 (de
Inventor
Joseph Pallant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HR Turner Willenhall Ltd
Original Assignee
HR Turner Willenhall Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HR Turner Willenhall Ltd filed Critical HR Turner Willenhall Ltd
Publication of EP0026582A2 publication Critical patent/EP0026582A2/de
Publication of EP0026582A3 publication Critical patent/EP0026582A3/en
Application granted granted Critical
Publication of EP0026582B1 publication Critical patent/EP0026582B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/18—Leaf springs
    • F16F1/26—Attachments or mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/1605—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the cinematic
    • B60N2/161—Rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/1635—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the drive mechanism
    • B60N2/164—Linear actuator, e.g. screw mechanism

Definitions

  • This invention relates to an adjustment mechanism which is particularly but not necessarily exclusively intended for use in adjusting the height of a vehicle seat relative to the vehicle.
  • vehicle seat height adjustment mechanism Various forms of vehicle seat height adjustment mechanism are currently available and, in general, these comprise lever type arrangements in which angular adjustments of the levers or links result in raising and lowering of the seat ( relative to the vehicle floor) the seat base usually being mounted on a seat slide structure via the lever or linkage arrangement so-that fore-and-aft adjustments of the seat can be effected as well as height adjustments.
  • the angular adjustments of the levers or links are effected by means of one or more user controllable actuators and to assist raising movements, which involve lifting the weight of the seat and its occupant, the general practice is to provide spring assisters which bias the seat upwardly against the weight of seat and occupant.
  • the object of the present invention is to provide an adjustment mechanism which when embodied in for example a vehicle seat as a height adjustment mechanism represents a considerable simplification of the type of height adjustment mechanism that has been employed hitherto.
  • an adjustment mechanism in which at least one spring element serves to space apart a pair of members and means is provided to controllably adjust the degree of deflection of the or each spring element and thereby adjust the spacing between said members.
  • the or each spring element not only serves to provide a biasing force acting between said members but is also instrumental in varying the spacing between said members thereby obviating the need for separate linkages.
  • an adjustment mechanism comprising a pair of members spaced apart by at least one spring element such that the spacing between said members varies in dependence upon the degree of deflection of the or each spring element, and means for controllably adjusting the deflection of the or each spring element, said control means being effective to stiffen the or each spring element so as to resist spring deflections due to external forces tending to vary the spacing between said members.
  • the or each spring element is of the kind which provides its biasing force in response to bending, e.g. a leaf type spring which may be in the form of a strip, bar or rod, the or each spring element being arranged so as to extend transversely between said members so that bending deflections thereof vary its angle of inclination relative to said members thereby further separating said members or bringing them towards one another.
  • a leaf type spring which may be in the form of a strip, bar or rod
  • the or each spring element being arranged so as to extend transversely between said members so that bending deflections thereof vary its angle of inclination relative to said members thereby further separating said members or bringing them towards one another.
  • At least one pair of spring elements is provided and conveniently the spring elements of each such pair are arranged so that they are oppositely inclined, said control means comprising an adjustable coupling element connecting the two spring elements together at positions intermediate said members in such a way that adjustment of said coupling elements bends said spring elements towards or away from each other, said coupling element being rigid in tension and/or compression so as to stiffen said spring elements against bending away and/or towards each other in response to external forces which tend to displace said members towards and/or away from each other.
  • each pair may be separate from one another or they may be integrally united with each other in which case they may be constituted by the upturned end portions of a generally U-shaped springy metal strip, bar or rod.
  • the coupling element may be of adjustable longitudinal extent or it may be provided with portions which can be adjusted longitudinally, preferably in response to rotation of said coupling element, said portions being engaged with respective spring elements.
  • the coupling element comprises a rotatable rigid spindle having a knob or the like for manipulation by the user and opposite handed screw threads at opposite end portions thereof engaged by components to which said spring elements are connected whereby rotation of the spindle causes said components to move towards or away from one another with consequent bending of said spring elements.
  • Such means are provided for ensuring that the spring elements undergo substantially equal bending deflections for a given adjustment of said coupling element.
  • such means may comprise constraints for preventing longitudinal movement of the spindle relative to at least one of said spaced members.
  • stop means are provided to limit bending deflection of the or each spring element and the or each spring element may be preformed so that it is unstressed or stressed to a minimum extent when said members are at one extreme position of spacing and so that it is progressively stressed up to maximum extent as said members move towards the opposite extreme spacing in response to deflection of the or each spring element.
  • the unstressed or minimum stress condition of the or each spring element conveniently corresponds to the maximum spacing between said members (which, in this event, will be connected one to the seat base and the one to the vehicle floor or slide structure). In this way, the spring elements serve to assist raising movement of the seat.
  • a further object of the present invention is to enable a less stiff spring to be used without the attendant disadvantage of increased tendency for the seat to tilt in the above manner.
  • an adjustment mechanism comprising a pair of members whose relative spacing is to be adjusted and at least one pair of spring elements which space said members apart, the spring elements being oppositely inclined and means being provided to controllably adjust the degree of deflection of both spring elements of each pair and thereby adjust the spacing between said members, characterised in that the spring elements of the or each pair are coupled together in such a way that when one spring element undergoes deflection independently of said control means the force responsible for such deflection is transmitted by the coupling means to the other spring element to cause the latter to deflect in the same manner.
  • said coupling means comprises, for each spring element pair, a pair of two armed levers associated one with each spring element, each lever being pivotally mounted on one of said members and having one arm connected to the associated spring element, the second arms of the levers being coupled together.
  • lever arrangement employed in the preferred embodiment may be used as a height adjustment mechanism in its own right, i.e. without the need for any spring elements as aforesaid.
  • an adjustment mechanism comprising a pair of members whose relative spacing is to be adjusted, at least one pair of two armed levers each pivotally mounted on one of said members, means coupling the first arms of said levers together, the second arms of said levers being connected to said second member, and control means for pivoting said levers in unison to vary the spacing between said members.
  • a seat height adjustment mechanism for adjusting the height of a seat base 10 (only part of which is shown ) relative to the vehicle floor structure or a seat slide structure.
  • the seat is mounted for fore-and-aft adjustment on a seat slide structure, the slides 11 of which are bridged by a pair of cross members 12 ( one only which is shown) located towards the front and rear respectively beneath the seat base 10.
  • the seat slide structure may be of conventional design and for this reason it will not be described further.
  • the seat base 10 is supported on the cross members 12 through the agency of a pair of leaf-type springs 14 each of which is generally U-shaped comprising a straight base 16 which is secured to a respective cross- member 12 and upwardly and obliquely projecting tongues 18.
  • the leaf springs 14 constitute the sole support for the seat base.
  • Each of the springs may be formed from a strip of springy metal so that the tongues 18 can be resiliently deflected downwardly from the solid line position shown in Figure 1 towards the position shown in broken outline.
  • each tongue 18 has a sleeve 20 clamped thereto, the sleeve 20 being provided with flanges 22 between which the tongue 18 can be clamped by means of a rivet or other fastener (not shown ) inserted through aligned holes 20, 26.
  • Each sleeve 20 rotatably journals a cylindrical block 28 whose axis extends generally parallel to the axes about which the tongues 18 are intended to bend.
  • the blocks 28 are slidably coupled to the seat base 10 by brackets 30 which have pin and slot connections 32, 34 with the blocks 28, each slot 34 being upwardly inclined away from the medial axis of the seat.
  • the brackets 30 are shown as being welded to the seat base frame; however in a modification they may be pivotally connected to the seat base frame for limited angular movement about a transverse axis so as to compensate for any twisting in the leaf springs that might otherwise occur when one end of the seat is raised higher than the other. Although shown inclined the slots 34 may be generally horizontal.
  • the blocks 28 are each formed with an internally threaded diametral throughbore by means of which they are engaged with screw-threaded end portions 36 of an actuating rod 37 which is held axially captive by collars 38 pinned to the ends of the rod 37 by pins 40 engaging in holes 42 so that the collars 38 abut against brackets 30.
  • brackets 30 are formed with vertical slots 48 to allow vertical movement of the rod 37 relative to the seat base 10.
  • One of the collars 38 is formed as part of a handle or knob 15 which enables the rod 37 to be rotated about its longitudinal axis.
  • the screw threaded portions 36 are oppositely handed so that, in response to rotation of the rod 37, the blocks 28 move towards or away from one another depending on the direction of rotation. Because the tongues 18 of each leaf spring are inclined in opposite directions, it will be seen that rotation of the rod 37 and hence displacement of the blocks 28 will cause the associated tongues 18 to bend towards or away from one another and seat base 10 will rise or fall relative to the cross members 12.
  • the rod 37 acts as a rigid connection between the tongues 18 and thereby stiffens them against deflection so that, contrary to what might be expected, the seat does not tend to bounce when the occupant seats himself or gets out of the seat.
  • the rod therefore controls the tongues 18 so that, for all practical purposes, they act as substantially rigid connections between the members 10, 12.
  • two handles or knobs 50 may be provided so that the front end of the seat can be raised or lowered independently of the rear end or vice versa, thereby allowing the attitude of the seat to be varied.
  • the handle or knob may be provided on only one of the rods 37 and there may be a drive transmission between the two rods so that both rods rotate in response to turning of the knob.
  • the drive transmission in this case may be operable selectively so that, in one mode of operation, both rods rotate but, in a second mode of operation, only the rod provided with the knob rotates.
  • raising or lowering of the seat base can be effected in said first mode and changes in the attitude, i.e. tilted angle, of the seat can be effected in the second mode.
  • the heightwise adjustment may be confined to one end only (e.g. the front end) of the sheet. In this event, only one leaf spring 14 need be used and the other end of the seat can be supported at a fixed height via pivots.
  • the slots 34 define the limits of heightwise adjustment.
  • the arrangement is conveniently such that the tongues 18 are unstressed or relatively unstressed when the pins 32 are located at the lower ends of the slots 34 and become increasingly stressed as the pins 32 move towards the upper ends of the slots 34.
  • tongues being integrally united with each other, they may be separate; instead of the leaf springs extending transversely of the seat, they may extend for-and-aft beneath opposite sides of the seat; and alternative forms of spring deflecting devices can be employed and such devices need not necessarily link two springs or other elements ( as in Figures 1 and 2) instead such devices may act between each spring tongue or other elements and the member to which the spring tongue or element is rigidly secured.
  • Figures 3 and 4 show diagrammatically further modifications.
  • two leaf springs of the form shown in Figures land 2 are superimposed.
  • the spring elements 16 are generally C-shaped and their ends are rigidly secured to the members 10, 12 respectively. Deflection of the spring 16 may be effected by a similar device to that shown in Figures 1 and 2, arranged to cooperate with the mid-portions of the springs.
  • Each leaf spring 14 has a pair of two armed levers 60, 62 associated with it. These levers are pivoted at 64, 66 to cross member 12 and have arms 68, 70 thereof coupled together by a sliding bolt 72 received in slot 74. The other arms 76, 78 are pivotally connected to the blocks 28 by pins 32a which pass through the slots 34. It will be understood that when for example the left hand tongue 18 in Figure 1 is depressed by an off centre load, the lever 60 tends to pivot counterclockwise causing lever 62 to pivot clockwise with a corresponding depression of the right hand tongue 18. Thus, the tendency for the seat to tilt in response to off centre loads is greatly reduced.
  • the arrangement of the levers 60, 62 is such that they may be used to effect height adjustments in their own right which means that the leaf springs 14 and spindle 37 may be omitted in this case.
  • user controllable means may be provided to effect pivoting of the lever 60, 62 in unison whereby the seat base is raised and lowered via the block 28 and bracket 30.
  • the control means in this embodiment may for example include a spindle having opposite handed screwthreaded portions engaging in corresponding female parts on the levers 60, 62 so that turning of the spindle in one sense raised the seat base and turning in the opposite sense lowers the seat base.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Seats For Vehicles (AREA)
EP80303073A 1979-09-29 1980-09-03 Verstellmechanismus Expired EP0026582B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB7933843 1979-09-29
GB7933843 1979-09-29
GB8003341 1980-01-21
GB8003341 1980-01-31

Publications (3)

Publication Number Publication Date
EP0026582A2 true EP0026582A2 (de) 1981-04-08
EP0026582A3 EP0026582A3 (en) 1981-08-05
EP0026582B1 EP0026582B1 (de) 1985-01-23

Family

ID=26273044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80303073A Expired EP0026582B1 (de) 1979-09-29 1980-09-03 Verstellmechanismus

Country Status (7)

Country Link
US (1) US4428553A (de)
EP (1) EP0026582B1 (de)
AU (1) AU540407B2 (de)
DE (1) DE3070018D1 (de)
ES (1) ES495458A0 (de)
GB (1) GB2062165B (de)
IE (1) IE50664B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102785A2 (de) * 1982-08-31 1984-03-14 Britax (Dynasafe) Limited Fahrzeugsitz
DE102016123836A1 (de) 2016-12-08 2018-06-14 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Sitz für ein Kraftfahrzeug mit zwei Schienenpaaren

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4129497B4 (de) * 1991-09-05 2006-11-23 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg 4-Wege-Sitzhöhenverstellung für einen Fahrzeugsitz
FR2783771B1 (fr) * 1999-07-12 2001-04-13 Peugeot Citroen Automobiles Sa Dispositif de reglage en position et de retournement d'un siege de vehicule automobile
US6361109B1 (en) 1999-09-27 2002-03-26 Magna Seating Systems Inc. Seat cushion height adjuster
US20040140707A1 (en) * 2003-01-17 2004-07-22 Ford Motor Company Vehicle seat pan and method for controlling vertical deflection
DE102004055535B3 (de) * 2004-11-17 2006-07-20 Johnson Controls Gmbh Strukturelement für einen Sitz, insbesondere für einen Kraftfahrzeugsitz
DE102016224512A1 (de) 2016-12-08 2018-06-14 Brose Fahrzeugteile Gmbh & Co. Kg, Coburg Fahrzeugsitzanordnung mit einer bodenschienenseitig angeordneten Antriebseinrichtung
DE102017113971A1 (de) * 2017-06-23 2018-12-27 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Querblattfederanordnung einer Fahrwerksachse eines Kraftfahrzeuges

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219386A (en) * 1962-07-30 1965-11-23 Bostrom Corp Seat assembly
DE1554041B1 (de) * 1965-07-10 1970-01-29 Opel Adam Ag Einrichtung zum Einstellen der Vorspannung der Federn von Federpolsterungen insbesondere an Kraftfahrzeugsitzen
DE1580622A1 (de) * 1966-06-28 1970-12-10 Keiper Recaro Gmbh Co Sitz,insbesondere fuer Kraftfahrzeuge
DE2251948A1 (de) * 1972-10-23 1974-05-02 Kiel Gmbh Franz Kraftfahrzeugsitz, insbesondere fahrersitz
US4093197A (en) * 1977-03-16 1978-06-06 Sears Manufacturing Company Leaf spring suspension

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219386A (en) * 1962-07-30 1965-11-23 Bostrom Corp Seat assembly
DE1554041B1 (de) * 1965-07-10 1970-01-29 Opel Adam Ag Einrichtung zum Einstellen der Vorspannung der Federn von Federpolsterungen insbesondere an Kraftfahrzeugsitzen
DE1580622A1 (de) * 1966-06-28 1970-12-10 Keiper Recaro Gmbh Co Sitz,insbesondere fuer Kraftfahrzeuge
DE2251948A1 (de) * 1972-10-23 1974-05-02 Kiel Gmbh Franz Kraftfahrzeugsitz, insbesondere fahrersitz
US4093197A (en) * 1977-03-16 1978-06-06 Sears Manufacturing Company Leaf spring suspension

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0102785A2 (de) * 1982-08-31 1984-03-14 Britax (Dynasafe) Limited Fahrzeugsitz
EP0102785A3 (de) * 1982-08-31 1985-01-23 Britax (Dynasafe) Limited Fahrzeugsitz
DE102016123836A1 (de) 2016-12-08 2018-06-14 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Sitz für ein Kraftfahrzeug mit zwei Schienenpaaren

Also Published As

Publication number Publication date
EP0026582A3 (en) 1981-08-05
GB2062165A (en) 1981-05-20
IE50664B1 (en) 1986-06-11
AU540407B2 (en) 1984-11-15
DE3070018D1 (en) 1985-03-07
US4428553A (en) 1984-01-31
IE802023L (en) 1981-03-29
EP0026582B1 (de) 1985-01-23
GB2062165B (en) 1984-08-22
AU6234280A (en) 1981-04-02
ES8106448A1 (es) 1981-08-16
ES495458A0 (es) 1981-08-16

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